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Publication date: 11/10/2021

Example of a Gaussian Process Model

This example uses data that demonstrates the flow of water through a Borehole that is drilled from the ground surface through two aquifers. Given a specified engineering model the Gaussian process lets us understand the impact of factors included in the model on the response, Y.

1. Select Help > Sample Data Library and open Design Experiment/Borehole Latin

2. Select Analyze > Specialized Modeling > Gaussian Process.

3. Select log10 Rw through Kw and click X.

4. Select Y and click Y.

5. Image shown hereIn JMP Pro, to run the analysis faster, leave the Fast GASP checked.

6. Click OK.

Figure 17.5 Borehole Latin Hypercube ReportĀ 

Borehole Latin Hypercube Report

The data on the actual by predicted plot fall along the Y = X line, indicating that the Gaussian process prediction model is a good approximation of the true function. In the Model Report, you see that the first factor, log10 Rw, has the highest total sensitivity. The estimated total sensitivity for log10 Rw explains more than 90% of the variation in the response. Factors with small theta values have little (or no) impact on the prediction formula. Use the profiler to visualize the sensitivities.

7. Click the Gaussian Process Model of Y red triangle and select Profiler.

The desirability functions automatically appear because the response, Y, has a Response Limits column property.

8. Click the Prediction Profiler red triangle and select Optimize and Desirability > Maximize Desirability.

Figure 17.6 Gaussian Process Model ProfilerĀ 

Gaussian Process Model Profiler

The desirability function is set to maximize the response Y because Y has goal set to Maximize in the Response Limits column property. Maximizing the desirability functions identifies the values of the factors that maximize the response. The shaded bands represent the 95% confidence intervals.

Note: Your estimates can differ from those shown in Figure 17.5, which were found using the Fast GASP algorithm.

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